First introduced in 2003, Calfee becomes the world’s first, and to this day only, bicycle manufacturer to couple carbon frames. Made by S and S Machine, these clever devices allow you to break apart the bike and pack into a suitcase for easier and much less expensive travel. Couplers are a frame option on all Calfee carbon frames; singles, tandems even triples convertible to tandems. S and S Machine couplers can be retrofit on all Calfee single frames.